Carburetor



. July 1, 1930. P. GWISDALLA 'CARBURETOR Filed April 26, 1926 INVENTOR.

Pe er @Wasda Nd Patented 1,1

Pn'rnnjewrsnnrtn, or

MIvNnnivoI'rY, imminenti. f v 1 oARBUnnTon Myinvention relatesto' a new anduseful f improvement in a "carburetor andeomprises I an improvement on my inventioni'setforth in myappli'cationv for Letters Patent of the rotor, the" shell or bowl forming p, cylinder provision in the carburetor-'of auxiliary fuel' walls forco-operating with ythe disc. Another object of thel invention 1 is the control means operable uponj the movement of thefthrottle -beyonda predetermined distance 4for admitting through .the auxiliary control means fuel 4kto the carburetor, soffthat when the engine'isrunjat'fthe mairimum".

- speed` for the amount of fuel admitted gcient in itsl functions: 1

through the primary fcontrol additional fuel may beadmitted through the secondary -or auxiliaryfcontrol to permit fof "a .greater 'speed and render thefcarburetor more elfi- A AnotherV object of the l presentfinvention istheprovision of atx-primary and" secondary and .arrangement Vof ,parts` 35 fuel Vvcontrol means Von the carburetor co9 operatinglwitheachf other with "ak lresultant economy in fuel consumption. K Other-ob "ectsg will 'appear hereinafter. Y Y The invention consists inVV the' V'combmation hereinafter def scribed andI claimed; j The invention willy be best yunderstood from al* reference tothe aocompanyingfdraw? ings whichl forma part vlof, the l' specification .,Figg 1 vis `a central vertical'sectional view of the.,invention.1girl 'i "l: `,-`Fig. 2 isa view taken onsubstantiallfy" line 2-.2 ofF f Q'Fig, 3 is au viewof the invention.` V ,Y Fig. :4: -is ya; Vfra'ginentaryf Iside 'elevational Vview` of"thefnventiontaken from the side opposite the sidexshown `rinfFigJ 3.V l.

agmentary side elevational.Y

. m- Eigg 5 is-fa fragmentaryVsectionalfrview' `rinteriorof the mixing. chamber 12"'and`sm- `lar-ribsl 'are formed ori-the inner-surface y.ofthe mixing chambers 12Y is acap 25 havnipple 3.2so that whengthe;nipple valvev u l 33" is `.adjusted to its kpr `1periposition toad! y fmitf a certain. amount of A`fuel vthroughv the i 192e.; serial No." 104,537,

y As shown in the drawings theZ main' body ofthe'oarburetor is .formed Vpreferably from o l ag single castingwand comprises a shell or bow-l forming portion 11icommunczdging` with the mixingv :chamberV 12` positioned j thereabove. `EXtending laterally outwardly f from the chamber 12 is the vdelivery conduit lfhavingtheA angularly turned portion 14 v Y which :is adapted for 1 connection incommunication with lthe intakeimanifold f of the engine. Projecting laterally outwardly "lfromgth'e bowl 11.1is a conduit 17' which servesto deliver the air yto thefcarburetor. A plurality of-1ribs -15 are Vformed vin the y of fthe bowl `-portion 11.` Secured'to thev Y bottom of thef portion-'11 is a 'suitable cap or 'closure 18 and extending aroundl the lower portionrof the/bowly 11 is a.`oireuin 7o ferential` flange 19.` 'PositionedaxiallyinY #the bowl 11 and theimixing eli'a1nber512 is a shaft or stem'ZO',l slidably mounted upon vwhich is a disc 21;having `afolowni'is'rardly,di-

rectedfcollar 22. A, spirali"springengages at onerfendl` the disc 21an'rlat'its opposite end a collar 24; which is'fmou'nted` upon the' stemi20- iMounted'uponthei upper portion v ing a: fueljinlet chamber 526; formed therein.

, LProjectingfrom onesidef of the cap 25 is 4la f [nipple 27 which is adapted for connection to'faisuitablesource L of fuellsupplygand comi` iiauriicates` throughgtlie passage -28 and the i passages 2 9` with thebhamber 26; Project-V fingj-froin` thefcap^25 is `a nipple 8O which communicates through the passage I 31 vwith .thechamberg26.",:Projectingfrom'fthe cap K l 2 5 is a nipple' y32,'in,which is;positionedthey needle valve '83 adapted upon thegithreading lofthe threadedhead: 3 4 in the" nipple 32 to, open' andclose communication off kthejpas` f cap y35 is providedfforthreading nonfthe l passage 28 the cap .35 ma'yvbefpositionedon thelnifpple 3,2preventingv dustforfother yac; cumulatonsto interferegwith the proper Voperation of ythe head 34 and to render un! 'Y due vtampering with the head 34 difiicult.

A needle valve 36 is provided for controlling communication of the passage 3l With the fuel delivery nipple 27, this needle valve 36 having a threaded' head Which threads intothe nipple, sothatadjustment of the needle valve may x be effected to, admit, through the passage 3l into the chamber 26,

n, `a' certain amount of fuel. A cap 38 isalsoy provided-for thelnippleyO. Y A..nipplel39.

projects outwardly from the head 25 in alignment With the nipple 324 and is provid ed with a bore in Which'lis insertedthe stem 39 carrying the 'threaded head/40 adapted for threadingin the nipple 39. This yhead is provided With'a coarse thread sothat the longitudinal fmovem'ent vof theV stem; 39V .to4 a markeddegreeis effected upon a slight threading of the head 40, `As shown in vF ig. 2-this l'stem 39 may be used to close communicationy between the passages 28and the passages 29v and under ordinary operat-l ing conditions when the vehicle -is being drivenbelovv al certain speed this Wouldbe the normal position yof the stem 39, asno i 43)9 isy a cap14l, through Which 'the stem 39 fuel is admitted into the..fcharnbera` through the passages 28. and V29 untilithe consumption of fuel by the engine lreaches a certain-amount. vflhreaded on theenipple fprojects. -Threaded intoffthe cap 25 is a seat forming portion 4t2-through which projects theV reduced portion 43 of the shaft or k'stemv 2O.` Mounted upon the upper end ofv V.the reduced portion43 isa valve head 44 for engaging the Seat`42, this valve head 44, VWhen in engagement with theseat 42, `pre-' venting the passage of fuel from the cham'-v ber 26 'into the -mixingbovvl-l 12;" f Astud 4,5 projects upwardlyfrom the Vu'pperface of the `head 44,-positioned about Whiclnin embracing `relation',` "is one end iof. spring 46,

the otherend g-of, which; engages :a WasherV 46', s against.. which {may} be. threaded. the

screw'46ffor'l adjusting Vthe tension ofthe spring 46. Y e.. ,l

- "Projected through' the -airf intake portieri i. n l7is a shaft 47 upon .Which is fixedly mount- ,up'on the outenend of theshaft 47 iszanv ed a butterfiy valvev 48. `Fixedly .mounted operating arm` 49, :to the vupper yend ofl which 4is.pi-votallyattached-arod 50 projected to Vafpofsitionv easily accessible to the driver ofthe vehicle'. The arm 49 is' alsoconne'ct- Y l ed byltheflink V51 'to the free'end-of an'arm f whichfisfiizedly mounted upon the 4shaft :53 projecting intothe bottoni cap V19, and

upon `which' is `xedlyniounted a cam54 adapted-itc engage'the lower V- end ofi the lshaft orstem'f20. v-

" The constructionV of'V A'these parts 'VisA such i that,Whendesired'the operator of "thevfve-V hiclemay, byfmoving'lthe rofd 50jlongitu- .dnalIy, effectief rocking lof the shaftf4rif` to A l'butterfiy valve 55 is fixedly mounted upona shaft 56 which is projected through the portion 14. Fixedly mounted upon'the shaft exteriorof the carburetor is an army "''to' Which is pivotally connected an operating rod '58 directed toa position accessible to vthe operator vof the vehicle, this ,rod 58 being [commonly ltermed the ,throttle rod. The ar1n57 is connected vby the link 59 to -anarm 60 which. is fixedly mountedupon the stem 39: exterior of the carburetor. e The connection of the link 59 with the arm 60I is jeffected'by means of a` vstud orbolt-62Which 1s projected through a slotl formed in the link 59'..y Y. v

e The structure isA such that when the operator desires to Vmove the throttle to feed i fuel tothe engine the butterfly valve 48 will normallybe in the position shownin Fig. 1. Whenpthe operatorstarts the engine the butterfly valve will be openedby operating the throttlerod 58. Asthe engine is 'started the' suction .from the engine will 23 to permit passage of .air around t 6;,fpe1phery ofthe disc, the ribs on. the

.lchamberfl2 spacing the Yperiphery of the -disc 21mfrom the inner surfaceof thechambertl2, the ldisc 21 `seating `When in the posi- `tionfshovvnin Fig. l at the bottomV of the chamber l2 and effectively closing this chamber against entry of air thereinto.- As thefsuction raises the disc 2l on:1 ofyits seat the air-isf permitted to'pass, through the air intakel? andlmiizv with the fuel-inthe mixing chamber 1 2andinthe delivery conduits `13 vandfl4.V It Ais ythus seen thatas inthe invention referred toin my previous applition Athe Vdelivery of .fuel to the mixing chamf beris controlled by the Suction of the engine,

the fhead 44' being slightly unseatedl as the `disclT .21@ `*moves e vertically upwardly. AThe `fuelf..fiovving .into the lchamber 26 will pass through the passage `3l, the needlevalve; 36

.beingjladjgusted' to permitthe entry of lthe proper amount of fuelginto this` chamber.

As the speed increasiesand a larger amount of fuell is desired'for: consumption than will pasvs'fthroughtheqpassage V31 the .throttle rod r,58 being moved; ,a sufficient distance y Ycauses. the pin 62 .to engage, the end .of Y.the

slot 6l,l after Whichyfurther movement of the throttle-'rod 58 `will 'effect aVV longitudinal movement.of"the"stem 39 soas to permit Vpassagefof fuel intothe-chamber 26through 'iso s the passages 28 and 29. The needle valve 33 is previously adjusted toy permit the passage of the desired amount of fuel through these passages 28 and 29.

With this arrangement there is provided a primaryfuel inlet controland asecondary fuel inlet control', the secondarycontrol being operated to permit the delivery of additional fuel to the engine only after the fuel vconsumption ofthe engine has reached `a certain degree so that when driving at low speeds a smaller amount Vof fuel is delivered to the engine thanl at higher speeds. Furthermore when `the speed of the engine reaches-a certainY degree toeffecta proportionateincrease in speed or power of the engine 1t 1s necessary that Va larger propor Y tionate amount befdelivered to the engine with said fuel chamber through a primary and to effect this ythe auxiliary control is brought into operation 4 While I have illustrated and described the preferred form of structure I doV not wish to limit myself Vto the yprecise embodiment ofthe structure shown,` but desire .to avail myself ofsuch variations and modification y ascome withinthe scope` of the appended' claim. r Y i Y Having thus describedjmy invention what I claim as new and desire'to secure by Letters Patent is:` t

In a carburetor of the class described hav-V v of said fuel cha'mberwith saidy mixing chamber; a fuel delivery pipe communicating passage; means Vfor controllingrcommunication` of said vprimary passage withv said l fuelchamber, saidhead having a secondary passage formed therein 'communicating with said fuel chamber and withfsaiddelivery pipeycontrol means for controlling com- Y K munication of said delivery pipe withsaid l 'secondary passage; and other controllmeans in `axial alignment with; said last mentioned control means for controlling L communication of said secondary passage with said fuel chamber a throttlev rod; and means oper able by `said throttle rodfforiopening said other control' means-at predetermined rpositions of said throttlerod In testimony foregoing; Y' y o PETER GWIsD/ALLA-. i

whereof I have signed the y 

